2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
(1) Calcium khi rau troponin C, ua rau muaj kev hloov pauv hauv tropomyosin uas nthuav tawm myosin-binding qhov chaw ntawm actin.
Thaum calcium tso tawm thaum lub cev nqaij daim tawv nws khi rau?
Cov leeg nqaij: Calcium tseem nyob hauv sarcoplasmic reticulum kom txog thaum tso tawm los ntawm kev txhawb nqa. Calcium ces khi rau troponin, ua rau troponin hloov pauv thiab tshem tawm tropomyosin los ntawm qhov chaw khi.
calcium khi nyob rau hauv cov leeg nqaij qhov twg los txhawb kev cog lus?
Piav qhia: rau pob txha pob txha cleaction, calcium binds rautroponin los nthuav tawm cov chaw ua si. Txhawm rau kom cov leeg pob txha pob txha tshwm sim, cov protein myosin yuav tsum tau khi rau cov protein actin thiab xaub nws kom txo tau qhov ntev ntawm sarcomere, uas yog lub contractile unit ntawm ib leeg.
Yuav ua li cas thaum calcium khi troponin?
Thaum khi calcium, troponin txav tropomyosin kom deb ntawm myosin-binding qhov chaw ntawm actin (hauv qab), tshem tawm nws zoo.
Yuav ua li cas khi rau actin thaum cov leeg nqaij contraction?
Myosin khi rau actin ntawm qhov chaw sib txuas ntawm globular actin protein. Myosin muaj lwm qhov chaw sib txuas rau ATP ntawm qhov kev ua haujlwm enzymatic hydrolyzes ATP rau ADP, tso tawm ib qho inorganic phosphate molecule thiab lub zog. ATP khi ua rau myosin tso tawm actin, tso cai rau actin thiab myosin cais tawm ntawm txhua tuslwm yam.
Pom zoo:
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Yuav ua li cas thaum koj ua rau koj cov leeg mob dhau?
Kev ua haujlwm dhau los tshwm sim thaum tus neeg tau txais kev cob qhia lub cev ntau dhau nrog kev so me ntsis thiab rov qab los tom qab ua haujlwm hnyav. Cov kev ntxhov siab uas tau muab tso rau ntawm cov leeg, pob qij txha thiab pob txha ua rau qaug zog thiab mobuas kawg cuam tshuam kev ua haujlwm.
Nyob rau hauv qhov ntxa kab mob cov tshuaj tiv thaiv kab mob khi rau?
Nyob rau hauv Graves disease, lub cev tiv thaiv kab mob tsim cov tshuaj tiv thaiv rau the TSH receptor. Cov tshuaj tiv thaiv no khi rau thiab txhawb nqa TSH receptors pom nyob rau hauv cov thyroid follicular hlwb, ua rau ntau ntau synthesis thiab secretion ntawm cov thyroid hormones.
Cov xwm txheej kho mob dab tsi ua rau muaj kab mob siab ua rau mob siab?
Tus kab mob siab ua rau mob siab yog ib qho mob tsis tshua muaj sai (feem ntau nyob rau hauv hnub lossis lub lis piam), loj necrosis ntawm daim siab parenchyma thiab txo qis hauv daim siab loj (mob daj atrophy); Nws feem ntau tshwm sim tom qab kis nrog qee tus kab mob siab kab mob siab kab mob siab Cov neeg muaj tus kab mob siab kab mob siab feem ntau rov zoo hauv 4 txog 8 lub lis piam, txawm tias tsis kho.
Pob mob plab ua rau tsam plab?
Cov tsos mob ntawm tus mob plab Cov kab mob plab kuj tuaj yeem ua rau tsam plab, mob plab, thiab kub hnyiab ntawm koj lub plab sab sauv, tab sis muaj ob peb qhov sib txawv tseem ceeb. rwj tuaj yeem ua rau koj lub plab o? plab mob ntau zaus tsis sib xws.
